Device for recovering valuable metals from wastewater
Through quantitative delivery and uniform sprinkling of precipitant agent, the problems of uneven concentration of precipitant agent and equipment blockage in traditional precipitation methods are solved, and efficient recycling of valuable metals and stable operation are achieved.
Patent Information
- Application Number
- CN202510624636.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2025-07-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the prior art, when the traditional precipitation method recovers valuable metals from wastewater, the delivery method of the precipitant leads to excessive concentration in the early stage or insufficient later stage, low reaction efficiency, and easy to form particles or agglomerate, block the equipment, and affect the stable operation of the device.
The quantitative dispensing mechanism, a batch tilt dispensing unit and a batch forward and reverse agitation assembly are adopted to realize the quantitative dispensing, uniform dispensing and stirring of the precipitant. The amount of precipitant is adjusted through the lifting observation assembly and the water inlet observation mechanism to avoid uneven concentration and blockage.
It improves the recycling efficiency of valuable metals, reduces production costs, improves the operating stability of the device and the utilization rate of precipitant, and avoids waste of precipitant and equipment blockage.
Smart Images
Figure CN120288921A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of valuable metal recovery, and specifically to a device for recovering valuable metals from wastewater. Background Art
[0002] With the rapid development of industry, a large amount of wastewater containing valuable metals is discharged, which not only causes waste of resources but also seriously pollutes the environment. At present, the main methods for recovering valuable metals from wastewater include chemical precipitation method, ion exchange method, electrolysis method, etc.
[0003] In the key link of precipitating and recovering valuable metals, traditional precipitation methods mostly adopt one-time addition of precipitants, and this method has obvious defects. One-time addition of a large amount of precipitants will lead to too high concentration of precipitants in the initial stage of the reaction with valuable metal ions and insufficient concentration in the later stage, resulting in low reaction efficiency, incomplete precipitation of valuable metal ions, and limited recovery efficiency; and it is easy to cause insufficient dissolution of precipitants to form particles or agglomerates due to too high local concentration, blocking the pores and pipelines of the treatment equipment and affecting the stable operation of the device. For this, we propose a device for recovering valuable metals from wastewater to solve the above problems. Summary of the Invention
[0004] Aiming at the deficiencies of the prior art, the present invention provides a device for recovering valuable metals from wastewater, which solves the problems raised in the background art.
[0005] To achieve the above object, the present invention is realized through the following technical solutions: A device for recovering valuable metals from wastewater, including a reaction tank, and a quantitative feeding mechanism is arranged inside the reaction tank, and the quantitative feeding mechanism is used for quantitatively feeding the precipitant into the wastewater; The quantitative feeding mechanism includes a rotating rod rotatably connected to the bottom wall of the reaction tank, a top plate is fixed at the top end of the rotating rod, a bottom plate is slidably connected to the rotating rod, two through holes are respectively formed through the top plate and the bottom plate, two first vertical tubes are fixed at the bottom of the top plate, two second vertical tubes are fixed at the bottom of the bottom plate, a feeding pipe is communicated with the top of the reaction tank, the top end of the feeding pipe is communicated with a hopper, a ring plate is arranged at the bottom of the bottom plate, an inclined surface is formed at one side of the bottom of the ring plate, the bottom end of the second vertical tube is rotatably connected to a pipe cover through a pin shaft, a connecting ball is fixed on the pipe cover, and the outer surface of the connecting ball is in contact with the bottom of the ring plate, an elevating and observing assembly for driving the ring plate to move up and down is arranged inside the reaction tank, and a driving assembly for driving the rotating rod to rotate intermittently is also arranged inside the reaction tank.
[0006] Preferably, the lifting and observing assembly includes an L-shaped plate fixed to the inner wall of the annular plate. The bottom of the L-shaped plate is fixed with a U-shaped plate. The top of the U-shaped plate penetrates through the reaction tank and extends to the outside of the reaction tank. The outer surface of the U-shaped plate is slidably connected to the inner surface of the reaction tank. One side of the U-shaped plate is fixed with an indicating plate one. The top of the reaction tank is fixed with a scale plate one. One side of the L-shaped plate is fixed with a rack one. A driving rod is rotatably connected between the inner walls of the reaction tank. A gear one is fixed on the driving rod. The gear one meshes with the rack one. One side of the reaction tank is fixed with a motor one. The motor one drives the driving rod to rotate.
[0007] Preferably, the driving assembly includes a vertical rod rotatably connected to the bottom wall of the reaction tank. The top end of the vertical rod is fixed with a split gear. A gear two is fixed on the rotating rod. The split gear meshes with the gear two. One side of the inner wall of the reaction tank is rotatably connected with a cross bar. One end of the cross bar is fixed with a first bevel gear. A second bevel gear is fixed on the vertical rod. The first bevel gear meshes with the second bevel gear. One side of the reaction tank is fixed with a motor two. The motor two drives the cross bar to rotate.
[0008] Preferably, an intermittent inclined feeding unit for evenly spreading the quantitatively fed precipitant into the wastewater is further arranged inside the reaction tank. The intermittent inclined feeding unit includes an L-shaped seat fixed to one side of the inner wall of the reaction tank. One side of the L-shaped seat is fixed with a mounting seat. A slider is slidably connected inside the mounting seat. A first spring is fixed between the top of the slider and the bottom of the mounting seat. The bottom of the slider is rotatably connected with a rotating plate through a pin shaft. The bottom of the rotating plate is rotatably connected with a T-shaped plate through a pin shaft. Two limiting columns are fixed to one side of the L-shaped seat.
[0009] Preferably, one side of the T-shaped plate is fixed with an inclined plate. One side of the inner wall of the reaction tank is fixed with a fixed seat. A rotating wheel is rotatably connected to the top of the fixed seat. A triangular arc plate is fixed to the top of the rotating wheel. Two connecting ears are fixed to the bottom of the T-shaped plate. The connecting ears are in contact with and press against the top of the triangular arc plate.
[0010] Preferably, an intermittent forward and reverse stirring assembly for evenly stirring the precipitant scattered into the wastewater is arranged inside the reaction tank. The intermittent forward and reverse stirring assembly includes a Z-shaped groove opened on the rotating wheel. One side of the inner wall of the reaction tank is fixed with a fixed rod. One end of the fixed rod is fixed with a square seat. A chute is opened inside the square seat. A sliding seat is slidably connected inside the chute. A moving rod is fixed to the bottom of the sliding seat. The bottom end of the moving rod penetrates through the square seat and extends to the bottom of the square seat. The outer surface of the moving rod is slidably connected to the inner surface of the square seat.
[0011] Preferably, a second spring is sleeved on the moving rod. The top end of the second spring is fixed to the bottom of the sliding seat, and the bottom end of the second spring is fixed to the inner wall of the sliding groove. A connecting seat is fixed to one side of the sliding seat, and a convex column is fixed to one side of the connecting seat. The convex column slides inside the Z-shaped groove. The bottom end of the moving rod is fixed with a square plate, and a second rack is fixed to the bottom of the square plate. A stirring rod is rotatably connected between opposite sides of the inner wall of the reaction tank. A paddle is fixed to the stirring rod, and a third gear is fixed to the stirring rod. The third gear meshes with the second rack.
[0012] Preferably, a water inflow observation mechanism is arranged inside the reaction tank. The water inflow observation mechanism includes a sliding rod slidably connected to the top of the reaction tank. The bottom end of the sliding rod extends into the reaction tank. A floating ball is fixed to the bottom end of the sliding rod, and an indicating plate 2 is fixed to the top end of the sliding rod. A scale plate 2 is fixed to the top of the reaction tank.
[0013] Preferably, a sedimentation tank is arranged on one side of the reaction tank. The sedimentation tank is communicated with the reaction tank through a connecting pipe. A water pump is installed on the connecting pipe. Pulley wheels are fixed to the output shafts of the rotating rod and the rotating wheel. The two pulley wheels are connected by a belt in a transmission manner. A drain pipe is communicated with one side of the reaction tank. A valve is installed on the drain pipe. Beneficial effects
[0014] The present invention provides a device for recovering valuable metals from wastewater. Compared with the prior art, the following beneficial effects are achieved: (1) Through the setting of the quantitative feeding mechanism, the quantitative feeding of the precipitant particles is realized. By adding the precipitant in small amounts and intermittently, the phenomenon that the concentration of the precipitant is too high at the initial stage of the reaction with the valuable metal ions and insufficient at the later stage, resulting in low reaction efficiency, is effectively avoided. The valuable metal ions are fully precipitated, and the recovery efficiency is greatly improved. Through the setting of the lifting and observing assembly and the water inflow observation mechanism, the amount of water inflow is observed by the water inflow observation mechanism, so as to adjust the feeding amount of the precipitant particles, avoid waste of the precipitant particles, and reduce the production cost.
[0015] (2) Through the setting of the intermittent inclined feeding unit, the fed precipitant particles fall onto the inclined plate. Through the intermittent back-and-forth inclination of the inclined plate, the precipitant particles can be evenly scattered into the wastewater, enabling the precipitant to be fully dissolved, avoiding the formation of particles or lumps, blocking the pores and pipelines of the treatment equipment, and improving the operating stability of the device.
[0016] (3) Through the setting of the intermittent positive and negative rotation stirring assembly, through the intermittent positive and negative rotation of the paddle, the wastewater can form a turbulent flow during stirring, thereby accelerating the precipitation efficiency of the valuable metal ions and improving the recovery efficiency. Description of the drawings
[0017] Figure 1 Isometric view of the external structure of the present invention; Figure 2 Isometric view of the internal structure of the reaction tank of the present invention; Figure 3 Isometric view of the quantitative feeding mechanism of the present invention Figure 1 ; Figure 4 Isometric view of the quantitative feeding mechanism of the present invention Figure 2 ; Figure 5 For the present invention Figure 4 Partial enlarged view of location A in the present invention; Figure 6 Isometric view of the intermittent tilting feeding unit and the intermittent forward and reverse stirring assembly of the present invention; Figure 7 Isometric view of the partial structure of the intermittent tilting feeding unit of the present invention; Figure 8 Exploded isometric view of the partial structure of the intermittent forward and reverse stirring assembly of the present invention.
[0018] In the figure: 1, reaction tank; 2, quantitative feeding mechanism; 3, lifting and observation assembly; 4, driving assembly; 5, intermittent tilting feeding unit; 6, intermittent forward and reverse stirring assembly; 7, water intake observation mechanism; 8, sedimentation tank; 9, connecting pipe; 10, water pump; 11, pulley; 12, belt; 13, drain pipe; 14, valve; 21, rotating rod; 22, top plate; 23, bottom plate; 24, through hole; 25, vertical pipe 1; 26, vertical pipe 2; 27, feed pipe; 28, hopper; 29, ring plate; 210, pipe cap; 211, connecting ball; 31, L-shaped plate; 32, U-shaped plate; 33, indicating plate 1; 34, scale plate 1; 35, rack 1; 36, driving rod; 37, gear 1; 38, motor 1; 41, vertical rod; 42, missing gear; 43, gear 2; 44, cross bar; 45, first bevel gear; 46, second bevel gear; 47, motor 2; 51, L-shaped seat; 52, mounting seat; 53, slider; 54, spring 1; 55, rotating plate; 56, T-shaped plate; 57, limiting column; 58, inclined plate; 59, fixed seat; 510, rotating wheel; 511, triangular arc plate; 512, connecting ear; 61, Z-shaped groove; 62, fixed rod; 63, square seat; 64, chute; 65, sliding seat; 66, moving rod; 67, spring 2; 68, connecting seat; 69, convex column; 610, square plate; 611, rack 2; 612, stirring rod; 613, paddle; 614, gear 3; 71, sliding rod; 72, floating ball; 73, indicating plate 2; 74, scale plate 2. Detailed implementation manners
[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0020] The embodiments of the present invention provide three technical solutions, specifically including the following embodiments: Embodiment
[0021] Please refer to Figures 1 - 5 , a device for recovering valuable metals from wastewater, including a reaction tank 1. A quantitative feeding mechanism 2 is arranged inside the reaction tank 1, and the quantitative feeding mechanism 2 is used to quantitatively feed a precipitant into the wastewater; The quantitative feeding mechanism 2 includes a rotating rod 21 rotatably connected to the bottom wall of the reaction tank 1. A top plate 22 is fixed to the top end of the rotating rod 21. A bottom plate 23 is slidably connected to the rotating rod 21. Both the top plate 22 and the bottom plate 23 are circular plates. Two through holes 24 are respectively formed through the top plate 22 and the bottom plate 23. The arrangement of the through holes 24 allows precipitant particles to enter the first vertical pipe 25 and the second vertical pipe 26. Two first vertical pipes 25 are fixed to the bottom of the top plate 22. Two second vertical pipes 26 are fixed to the bottom of the bottom plate 23. Both ends of the first vertical pipe 25 and the second vertical pipe 26 are of an open design. When the first vertical pipe 25 moves downward, it can be inserted into the second vertical pipe 26, and the diameter of the second vertical pipe 26 is larger than that of the first vertical pipe 25. A feed pipe 27 is connected to the top of the reaction tank 1. The bottom end of the feed pipe 27 extends into the reaction tank 1, and the bottom end of the feed pipe 27 is in sliding contact with the top of the top plate 22. The top end of the feed pipe 27 is connected to a hopper 28, and precipitant particles are poured into the hopper 28. A ring plate 29 is arranged at the bottom of the bottom plate 23. The top of the ring plate 29 is in rotational contact with the bottom plate of the bottom plate 23. An inclined surface is formed on one side of the bottom of the ring plate 29. The arrangement of the inclined surface allows the pipe cover 210 to be naturally opened by its own gravity when rotating to this position for material spreading. The bottom end of the second vertical pipe 26 is rotatably connected to the pipe cover 210 through a pin shaft. A connecting ball 211 is fixed to the pipe cover 210, and the outer surface of the connecting ball 211 is in contact with the bottom of the ring plate 29. An elevating and observing assembly 3 for driving the ring plate 29 to move up and down is arranged inside the reaction tank 1, and a driving assembly 4 for driving the rotating rod 21 to rotate intermittently is also arranged inside the reaction tank 1.
[0022] The lifting and observing assembly 3 includes an L-shaped plate 31 fixed to the inner wall of the annular plate 29. A U-shaped plate 32 is fixed to the bottom of the L-shaped plate 31. The top of the U-shaped plate 32 penetrates through the reaction tank 1 and extends to the outside of the reaction tank 1. The outer surface of the U-shaped plate 32 is slidably connected to the inner surface of the reaction tank 1. A first indicating plate 33 is fixed to one side of the U-shaped plate 32. A first scale plate 34 is fixed to the top of the reaction tank 1. Scale lines are engraved on the first scale plate 34. The first indicating plate 33 points to the reading on the scale line, and the pointed reading represents the amount of precipitant particles discharged at one time by the first vertical pipe 25 and the second vertical pipe 26. A first rack 35 is fixed to one side of the L-shaped plate 31. A driving rod 36 is rotatably connected between the inner walls of the reaction tank 1. A first gear 37 is fixed to the driving rod 36. The first gear 37 meshes with the first rack 35. A first motor 38 is fixed to one side of the reaction tank 1. The first motor 38 is a three-phase asynchronous motor that can rotate forward and backward, is controlled by an external switch, and is electrically connected to an external power supply. The first motor 38 drives the driving rod 36 to rotate. The output end of the first motor 38 is fixed to one end of the driving rod 36 through a coupling.
[0023] The driving assembly 4 includes a vertical rod 41 rotatably connected to the bottom wall of the reaction tank 1. A missing gear 42 is fixed to the top end of the vertical rod 41. A second gear 43 is fixed to the rotating rod 21. The missing gear 42 meshes with the second gear 43. When the missing gear 42 rotates one circle, the second gear 43 rotates half a circle, thereby realizing intermittent rotation. The purpose of the intermittent rotation of the second gear 43 is to allow sufficient discharging time after the pipe cap 210. One side of the inner wall of the reaction tank 1 is rotatably connected to a cross bar 44. A first bevel gear 45 is fixed to one end of the cross bar 44. A second bevel gear 46 is fixed to the vertical rod 41. The first bevel gear 45 meshes with the second bevel gear 46. A second motor 47 is fixed to one side of the reaction tank 1. The second motor 47 is controlled by an external switch and is electrically connected to an external power supply. The second motor 47 drives the cross bar 44 to rotate. The output end of the second motor 47 is fixed to one end of the cross bar 44 through a coupling.
[0024] Through the setting of the quantitative feeding mechanism 2, the quantitative feeding of precipitant particles is realized. By adding the precipitant in small amounts and intermittently, the phenomenon that the concentration of the precipitant is too high at the initial stage and insufficient at the later stage of the reaction with valuable metal ions, and the reaction efficiency is low is effectively avoided, so that the valuable metal ions are fully precipitated, and the recovery efficiency is greatly improved. Through the setting of the lifting and observing assembly 3 and the water inflow observing mechanism 7, the amount of water inflow is observed by the water inflow observing mechanism 7, so as to adjust the feeding amount of precipitant particles, avoid waste of precipitant particles, and reduce the production cost.
[0025] A sedimentation tank 8 is provided on one side of the reaction box 1. The sedimentation tank 8 is used to precipitate suspended particles in the wastewater. The sedimentation tank 8 is connected to the reaction box 1 through a connecting pipe 9. A water pump 10 is installed on the connecting pipe 9. The water pump 10 is controlled by an external switch and is electrically connected to an external power supply. After the water pump 10 is started, the wastewater in the sedimentation tank 8 can be introduced into the reaction box 1. Pulleys 11 are fixed on the output shafts of the rotating rod 21 and the rotating wheel 510. The two pulleys 11 are connected by a belt 12. Through the arrangement of the pulley 11 and the belt 12, the rotating rod 21 can synchronously drive the rotating wheel 510 to rotate when it rotates. A drain pipe 13 is connected on one side of the reaction box 1. The drain pipe 13 is used to discharge wastewater. A valve 14 is installed on the drain pipe 13. Example
[0026] Based on Example 1, see Figures 6 - 7 As shown, the interior of the reaction box 1 is also provided with an intermittently inclined spreading unit 5 for evenly spreading the quantitatively dosed precipitant into the wastewater, and the intermittently inclined spreading unit 5 includes an L-shaped seat 51 fixed to one side of the inner wall of the reaction box 1, a mounting seat 52 is fixed to one side of the L-shaped seat 51, a slider 53 is slidably connected inside the mounting seat 52, a spring 54 is fixed between the top of the slider 53 and the bottom of the mounting seat 52, the spring 54 is used to reset the slider 53, the bottom of the slider 53 is rotatably connected to a rotating plate 55 through a pin shaft, the bottom of the rotating plate 55 is rotatably connected to a T-shaped plate 56 through a pin shaft, two limit columns 57 are fixed to one side of the L-shaped seat 51, the limit columns 57 are used to limit the swing amplitude of the T-shaped plate 56, and one side of the T-shaped plate 56 is rotatably connected to one side of the T-shaped plate 56 through a pin shaft.
[0027] An inclined plate 58 is fixed to one side of the T-shaped plate 56. The inclined plate 58 is provided to allow the precipitant particles to slide down to the left and to the right. A fixing seat 59 is fixed to one side of the inner wall of the reaction box 1. A rotating wheel 510 is rotatably connected to the top of the fixing seat 59. A triangular arc plate 511 is fixed to the top of the rotating wheel 510. Two connecting ears 512 are fixed to the bottom of the T-shaped plate 56. The connecting ears 512 are in contact and extrusion with the top of the triangular arc plate 511.
[0028] By setting the intermittently tilted spreading unit 5, the deposited precipitant particles fall onto the inclined plate 58. By intermittently tilting the inclined plate 58 back and forth, the precipitant particles can be evenly sprinkled into the wastewater, allowing the precipitant to fully dissolve, avoiding the formation of particles or agglomerations, clogging the pores and pipes of the treatment equipment, and improving the stability of the device operation. Example
[0029] Based on Example 2, see Figure 2 , Figure 6 , Figure 8As shown in the figure, an intermittent positive and reverse stirring assembly 6 for uniformly stirring the precipitant sprinkled into the wastewater is arranged in the reaction tank 1. The intermittent positive and reverse stirring assembly 6 includes a Z-shaped groove 61 formed in the runner 510. The Z-shaped groove 61 is a closed groove body. One side of the inner wall of the reaction tank 1 is fixed with a fixed rod 62. One end of the fixed rod 62 is fixed with a square seat 63. A chute 64 is formed inside the square seat 63. A sliding seat 65 is slidably connected inside the chute 64. A moving rod 66 is arranged at the bottom of the sliding seat 65. The bottom end of the moving rod 66 penetrates through the square seat 63 and extends to the bottom of the square seat 63. The outer surface of the moving rod 66 is slidably connected with the inner surface of the square seat 63.
[0030] A second spring 67 is sleeved on the moving rod 66. The second spring 67 is provided to reset the sliding seat 65 and the moving rod 66. The top end of the second spring 67 is fixed to the bottom of the sliding seat 65, and the bottom end of the second spring 67 is fixed to the inner wall of the chute 64. A connecting seat 68 is fixed to one side of the sliding seat 65. A convex column 69 is fixed to one side of the connecting seat 68. The convex column 69 slides inside the Z-shaped groove 61. A square plate 610 is fixed to the bottom end of the moving rod 66. A second rack 611 is fixed to the bottom of the square plate 610. A stirring rod 612 is rotatably connected between the opposite sides of the inner wall of the reaction tank 1. A paddle 613 is fixed to the stirring rod 612. A third gear 614 is fixed to the stirring rod 612. The third gear 614 meshes with the second rack 611.
[0031] Through the arrangement of the intermittent positive and reverse stirring assembly 6, through the intermittent positive and reverse rotation of the paddle 613, turbulence can be formed in the wastewater during stirring, thereby accelerating the precipitation efficiency of valuable metal ions and improving the recovery efficiency.
[0032] A water inflow observation mechanism 7 is arranged inside the reaction tank 1. The water inflow observation mechanism 7 includes a sliding rod 71 slidably connected to the top of the reaction tank 1. The bottom end of the sliding rod 71 extends into the reaction tank 1. A floating ball 72 is fixed to the bottom end of the sliding rod 71. The floating ball 72 is made of foam material and can float on the wastewater. An indicating plate two 73 is fixed to the top end of the sliding rod 71. A scale plate two 74 is fixed to the top of the reaction tank 1. The indication of the indicating plate two 73 pointing to the scale on the scale plate two 74 represents the magnitude of the wastewater introduction volume.
[0033] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.
[0034] During operation, the wastewater is introduced into the sedimentation tank 8 for sedimentation. It is left standing in the sedimentation tank 8 for a period of time to allow the suspended particles to settle naturally. Then, the water pump 10 is started to pump the sedimented wastewater into the reaction tank 1. Further, the precipitant particles are added into the hopper 28. Then, the second motor 47 is started. The second motor 47 drives the missing gear 42 to rotate, and then the missing gear 42 drives the second gear 43 to rotate intermittently by 180 degrees. Further, it drives the rotating rod 21, the top plate 22, and the bottom plate 23 to rotate intermittently by 180 degrees. When the feed pipe 27 is aligned with the through hole 24, a part of the precipitant particles are introduced into the first vertical pipe 25 and the second vertical pipe 26. When the bottom plate 23 rotates, it drives the connecting ball 211 to slide on the bottom plate of the ring plate 29. When the connecting ball 211 slides to the inclined surface, the pipe cap 210 naturally opens under the influence of gravity. At this time, the precipitant particles fall into the reaction tank 1. By starting the first motor 38, the first motor 38 drives the ring plate 29 to move up and down, thereby realizing the adjustment of the amount of precipitant particles put in. When the rotating rod 21 rotates, it synchronously drives the runner 510 to rotate. Then, the triangular arc plate 511 intermittently contacts the two connecting ears 512, further driving the T-shaped plate 56 to swing intermittently, and then making the inclined plate 58 swing intermittently and tilt. After the precipitant particles fall onto the inclined plate 58, they tilt to the left and right and are evenly scattered into the wastewater. When the runner 510 rotates, the convex column 69 slides in the Z-shaped groove 61, further driving the moving rod 66 to move reciprocally up and down, further driving the second rack 611 to move up and down, further driving the third gear 614 to rotate forward and backward, and further driving the paddle 613 to rotate intermittently forward and backward for stirring, so as to fully dissolve the precipitant particles in the wastewater, fully react, precipitate the valuable metal ions in the wastewater to form metal precipitates. Then, the valve 14 is opened, and the wastewater and metal precipitates are discharged through the drain pipe 13. The mixture is filtered by a filtering device to separate the metal precipitates from the wastewater, and the metal-rich filter residue is collected. Then, valuable metals are extracted from it by methods such as roasting and acid leaching to obtain high-purity metal products.
[0035] The embodiments of the invention have been described in detail above, but the above content is only the preferred embodiments of the invention and cannot be considered as limiting the scope of implementation of the invention. All equivalent changes and improvements made according to the scope of the application of the invention should still fall within the scope covered by the patent of the invention.
Claims
1. An apparatus for recovering valuable metals from wastewater, comprising a reaction tank (1), characterized in that: Inside the reaction tank (1), a quantitative feeding mechanism (2) is provided, and the quantitative feeding mechanism (2) is used to quantitatively feed a precipitant into the wastewater; The quantitative feeding mechanism (2) includes a rotating rod (21) rotatably connected to the bottom wall of the reaction tank (1). The top end of the rotating rod (21) is fixed with a top plate (22). A bottom plate (23) is slidably connected to the rotating rod (21). Two through holes (24) are respectively formed through the top plate (22) and the bottom plate (23). Two vertical pipes one (25) are fixed to the bottom of the top plate (22). Two vertical pipes two (26) are fixed to the bottom of the bottom plate (23). The top of the reaction tank (1) is communicated with a feed pipe (27). The top end of the feed pipe (27) is communicated with a hopper (28). A ring plate (29) is arranged at the bottom of the bottom plate (23). An inclined surface is formed on one side of the bottom of the ring plate (29). The bottom end of the vertical pipe two (26) is rotatably connected to a pipe cover (210) through a pin shaft. A connecting ball (211) is fixed to the pipe cover (210). The outer surface of the connecting ball (211) is in contact with the bottom of the ring plate (29). An elevating and observing assembly (3) for driving the ring plate (29) to move up and down is arranged inside the reaction tank (1). A driving assembly (4) for driving the rotating rod (21) to rotate intermittently is also arranged in the reaction tank (1).
2. The device for recovering valuable metals from wastewater according to claim 1, characterized in that: The elevating and observing assembly (3) includes an L-shaped plate (31) fixed to the inner wall of the ring plate (29). A U-shaped plate (32) is fixed to the bottom of the L-shaped plate (31). The top of the U-shaped plate (32) penetrates through the reaction tank (1) and extends to the outside of the reaction tank (1). The outer surface of the U-shaped plate (32) is slidably connected to the inner surface of the reaction tank (1). An indicating plate one (33) is fixed to one side of the U-shaped plate (32). A scale plate one (34) is fixed to the top of the reaction tank (1). A rack one (35) is fixed to one side of the L-shaped plate (31). A driving rod (36) is rotatably connected between the inner walls of the reaction tank (1). A gear one (37) is fixed to the driving rod (36). The gear one (37) is engaged with the rack one (35). A motor one (38) is fixed to one side of the reaction tank (1). The motor one (38) drives the driving rod (36) to rotate.
3. The device for recovering valuable metals from wastewater according to claim 1, characterized in that: The driving assembly (4) includes a vertical rod (41) rotatably connected to the bottom wall of the reaction tank (1). A missing gear (42) is fixed to the top end of the vertical rod (41). A gear two (43) is fixed to the rotating rod (21). The missing gear (42) is engaged with the gear two (43). A cross rod (44) is rotatably connected to one side of the inner wall of the reaction tank (1). A first bevel gear (45) is fixed to one end of the cross rod (44). A second bevel gear (46) is fixed to the vertical rod (41). The first bevel gear (45) is engaged with the second bevel gear (46). A motor two (47) is fixed to one side of the reaction tank (1). The motor two (47) drives the cross rod (44) to rotate.
4. The device for recovering valuable metals from wastewater according to claim 1, characterized in that: Inside the reaction tank (1), there is also an intermittent inclined feeding unit (5) for evenly spreading the quantitatively fed precipitant into the wastewater. The intermittent inclined feeding unit (5) includes an L-shaped seat (51) fixed to one side of the inner wall of the reaction tank (1). One side of the L-shaped seat (51) is fixed with a mounting seat (52). A slider (53) is slidably connected inside the mounting seat (52). A first spring (54) is fixed between the top of the slider (53) and the bottom of the mounting seat (52). The bottom of the slider (53) is rotatably connected to a rotating plate (55) through a pin shaft. The bottom of the rotating plate (55) is rotatably connected to a T-shaped plate (56) through a pin shaft. Two limiting columns (57) are fixed to one side of the L-shaped seat (51).
5. The device for recovering valuable metals from wastewater according to claim 4, wherein: One side of the T-shaped plate (56) is fixed with an inclined plate (58). One side of the inner wall of the reaction tank (1) is fixed with a fixed seat (59). The top of the fixed seat (59) is rotatably connected to a rotating wheel (510). The top of the rotating wheel (510) is fixed with a triangular arc plate (511). Two connecting ears (512) are fixed to the bottom of the T-shaped plate (56). The connecting ears (512) are in contact with and pressed against the top of the triangular arc plate (511).
6. The device for recovering valuable metals from wastewater according to claim 1, wherein: Inside the reaction tank (1), there is an intermittent forward and reverse stirring assembly (6) for evenly stirring the precipitant spread into the wastewater. The intermittent forward and reverse stirring assembly (6) includes a Z-shaped groove (61) opened on the rotating wheel (510). One side of the inner wall of the reaction tank (1) is fixed with a fixed rod (62). One end of the fixed rod (62) is fixed with a square seat (63). A chute (64) is opened inside the square seat (63). A sliding seat (65) is slidably connected inside the chute (64). A moving rod (66) is at the bottom of the sliding seat (65). The bottom end of the moving rod (66) passes through the square seat (63) and extends to the bottom of the square seat (63). The outer surface of the moving rod (66) is slidably connected to the inner surface of the square seat (63).
7. The device for recovering valuable metals from wastewater according to claim 6, characterized in that: A second spring (67) is sleeved on the moving rod (66). The top end of the second spring (67) is fixed to the bottom of the sliding seat (65). The bottom end of the second spring (67) is fixed to the inner wall of the chute (64). One side of the sliding seat (65) is fixed with a connecting seat (68). One side of the connecting seat (68) is fixed with a convex column (69). The convex column (69) slides inside the Z-shaped groove (61). The bottom end of the moving rod (66) is fixed with a square plate (610). A second rack (611) is fixed to the bottom of the square plate (610). A stirring rod (612) is rotatably connected between the opposite sides of the inner wall of the reaction tank (1). A paddle (613) is fixed on the stirring rod (612). A third gear (614) is fixed on the stirring rod (612). The third gear (614) meshes with the second rack (611).
8. The device for recovering valuable metals from wastewater according to claim 1, characterized in that: Inside the reaction tank (1), a water inflow observation mechanism (7) is provided. The water inflow observation mechanism (7) includes a sliding rod (71) slidably connected to the top of the reaction tank (1). The bottom end of the sliding rod (71) extends into the reaction tank (1). A floating ball (72) is fixed to the bottom end of the sliding rod (71). An indicating plate II (73) is fixed to the top end of the sliding rod (71). A scale plate II (74) is fixed to the top of the reaction tank (1).
9. The device for recovering valuable metals from wastewater according to claim 5, characterized in that: A sedimentation tank (8) is provided on one side of the reaction tank (1). The sedimentation tank (8) is communicated with the reaction tank (1) through a connecting pipe (9). A water pump (10) is installed on the connecting pipe (9). Pulley wheels (11) are fixed to the output shafts of the rotating rod (21) and the rotating wheel (510). The two pulley wheels (11) are drivingly connected by a belt (12). A drain pipe (13) is communicated with one side of the reaction tank (1). A valve (14) is installed on the drain pipe (13).